Oesman, I. N., H. Gunardi, B. Madiyono, S. Sastroasmoro, and S. T. Putra. “Profile and Prediction of Severity of Rheumatic Mitral Stenosis in Children”. Medical Journal of Indonesia, Vol. 5, no. 3, July 1996, pp. 152-7, doi:10.13181/mji.v5i3.864.